CVE-2026-54100

Windows-machine-config-operator: windows-machine-config-operator: ssh host key not verified enables credential theft

Published Jun 22, 2026 CVSS 3.1 · 8.3 High EPSS < 1% KEV · Not listed
Description
A flaw was found in the Windows Machine Config Operator (WMCO) for Red Hat OpenShift Container Platform. WMCO establishes SSH connections to Windows worker nodes without verifying the remote server host key. An adjacent-network attacker who can intercept or redirect WMCO's SSH session can capture WICD and kubelet bootstrap credentials transferred during node configuration, enabling compromise of Windows node identities in the cluster.

Remediation

Vendor Workaround

At this time, no mitigation or workaround is available for this vulnerability. Customers are advised to apply the appropriate updates as they become available.

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
CPEs cpe:/a:redhat:windows_machine_config:10.20::el9
References
Type Values Removed Values Added
CPEs cpe:/a:redhat:windows_machine_config:10.19::el9
References
Type Values Removed Values Added
CPEs cpe:/a:redhat:windows_machine_config:10.21::el9
References
Type Values Removed Values Added
CPEs cpe:/a:redhat:windows_machine_config cpe:/a:redhat:windows_machine_config:10.22::el9
References
Type Values Removed Values Added
First Time appeared Redhat openshift Container Platform
Redhat openshift For Windows Containers
Vendors & Products Redhat openshift Container Platform
Redhat openshift For Windows Containers
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description A flaw was found in the Windows Machine Config Operator (WMCO) for Red Hat OpenShift Container Platform. WMCO establishes SSH connections to Windows worker nodes without verifying the remote server host key. An adjacent-network attacker who can intercept or redirect WMCO's SSH session can capture WICD and kubelet bootstrap credentials transferred during node configuration, enabling compromise of Windows node identities in the cluster.
Title Windows-machine-config-operator: windows-machine-config-operator: ssh host key not verified enables credential theft
First Time appeared Redhat
Redhat openshift
Redhat windows Machine Config
Weaknesses CWE-295
CPEs cpe:/a:redhat:openshift:4
cpe:/a:redhat:windows_machine_config
Vendors & Products Redhat
Redhat openshift
Redhat windows Machine Config
References
Metrics cvssV3_1

{'score': 8.3, 'vector': 'CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
redhat
Published
Updated
Oct 14, 2026, 2:41 AM
Reserved
Jun 11, 2026, 7:02 PM
Status
Modified
Published
Jun 22, 2026, 2:17 PM
Modified
Oct 14, 2026, 3:17 AM
Severity
Important
Public date
Jun 10, 2026, 12:00 AM